I have a 3rd story flat roof I need to replace. I have had some quotes that range from $3800 to $6000. It has about 2 inches of pitch and "other" asphalt like layers. The dimensions are 18' x 13' + a small flat dormer of about 10' x 8' so just over 300 sqft. I'm going to assume this roof has never been torn down. It is a 100 year old home in Toronto. Roof deck is 1" thick planks. I have previously insulated between the rafters and there is an air gap of about an inch under the deck. Enough back story for now
So, I'm totally broke and with a badly leaking roof. I did some price crunching and I think I can diy this for a little over $1,500 for materials some gear and waste bin.
I want to rip it down to the deck, then screw 1/2" ply over. Sand plywood (esp edges). I've watched and read about the process by which you adhere the epdm and do the joints with quick seam tape after priming. I've scoured the web and done research. But at the end of the day I lack experience with this. IF I follow the Firestone howtos, am I likely to succeed? Guess I'm looking for some knowledeable people to warn me about common mistakes. And I have a few particular questions too.
One thing is that this is a semi detached house. The roof on my neighbours side is an asphalt based roof, which I understand does NOT work with epdm. My idea is to put a piece of metal flashing along the border. It will need a bend to go from my lower level to step up to hers. Then my epdm up to the inside edge of this step and then the epdm form flash. This would isolate the two types of materials, right? Or maybe I build a small ridge (2x4?) down the length and then run epdm up and over then cap with flashing and caulking esp on her side. Doomed to fail?
Also, the outside edge of the roof, can it just be the epdm folded over the facia a few inches then trimmed with wood or should I follow Firestone guide which says fold over side, nail corner flashing on top then quickprime followed by quickseam flashing (3" on metal flashing 2" on epdm). Finally use roller. So? Am I missing something??
Those are my immediate 2 specific questions, and my general question about the feasability of this as diy..